SU362140A1 - DEVICE FOR MOVING THE WORKING BODY OF THE PASSING COMBINE - Google Patents

Description

one

A device for moving the working body of the tunnel miner, including the articulated parallelogram, the lateral links of which are equipped with “corrugated cams” are connected by hydraulic jacks, a pumping station with two pumps and a reversing slide.

The proposed device is characterized in that it is provided with spools interacting with the links of the narallogragramma, each of which is connected to the pressure line of one of the pumps and the supply line of the hydraulic cylinders.

This eliminates the possibility of automatically changing the speed of movement of the working body simultaneously with the reversal of the swing direction.

FIG. 1 shows a combine with the proposed device g, top view; in fig. 2 - the same, rear view; in fig. 3 is a basic hydraulic circuit for driving the oscillator of the working body and the mechanism for switching the spools.

The driving machine on which the proposed unit is placed. My device consists of a working body 1, berm milling cutters 2 with augers and a loading body, a crawler cart 3 p 4. The working body / is suspended pivotally on two levers 5 and 6 that are pivotally connected to frame 4 and with the rods of hydraulic jacks 7, pivotally mounted on the frame. On the frame, in addition, spools 8, 9, 10 and // are reinforced, controlled by cams 12, 13, 14 and 15. Cams 12 -A 13 are fixed on lever 6 and control the spools S n 9 respectively, and cams 14 15 - on the lever 5, and they control the spool. mn 10 and 11, respectively. Both gondrokkramt 7 are connected to each other by hydraulic lines (the ponaroshok cavity of one communicates with the piston cavity of the other, and further with the hydraulic lock 16). The lock 16 is connected to a hydraulic line for 17–18 seconds. reversible spool 19, mechanically fixed in extreme positions, non-switchable hydrocylindrome 20, which is connected by hydraulic lines to spool valve 8 and // connected to pump 21, spools 9 and 10 are connected to hydraulic lines 17 and 18, which connect hydraulic lock 16 reversing valve 19, through clans 22 and 23, as well as with a pump 24. Hydrojacks 7 are fed from a pumping station, which includes pumps 21 and 24 and filters 25. The main lines of pumps 21 and 24 are interconnected via a check valve-25. The pressure in the hydraulic circuit is limited by the safety valve 27.

The harvester processes the face following

in a way. Due to the tracked harvester

moving to the bottom and at the same time working

body} swings left or right. In this case, the hydraulic jacks 7 receive the working fluid from pumps 21 and 24 through the reversing slide valve 19, for example, via the hydraulic mains 17. From the first cavities of the hydraulic jacks 7, the working fluid is discharged along the hydromagnet 18 through the reversible key 19 to the oil tank. In a predetermined position, the cam 14 switches the spool 10 to a position in which the working fluid from the pump 24 through the spool 10 and the check valve 23 enters the hydraulic line 18 communicated with the drain, and the hydraulic fluid 7 receives the working fluid only from the return pump 21, swing speed decreases. When the working body comes to the right extreme position, the cam 12 switches the spool 8 into a position in which the working fluid from the pump 21 flows through the spool 8 into the hydraulic cylinder 20 and switches the reversible spool 19 to another extreme position. In this case, the working fluid from the pump 21 enters the line 18 and further into the right cavities of the hydraulic jacks 7, i.e., the swing direction of the working member is reversed. At the same time, the working fluid from the pump 24 continues to flow into the main line 18 and, since the main line 18 after the reverse becomes pressurized, then also into the right cavities of the hydraulic jacks 7. At the same time, the working body starts to swing to the left at high speed determined by the joint operation of the pumps 21 and 24 .

In a predetermined position of the working body, cam 13 switches the valve 9 and connects the pump 24 through the valve 9 and the reverse clan 22 with the hydraulic line 17, which prevents the working body from moving to the left together with the drain. The working fluid is again supplied to the hydraulic jacks only from the pump 21, and the pump 24 is drained, the pressure of the working fluid from the pump 21 closes the check valve 26. When the working member approaches the leftmost position, the cam 15 switches the spool 11, which directs

working fluid into the left cavity of the hydraulic cylinder 20 and switches the reversing valve 19. This causes the swing to reverse and simultaneously change the swing speed, as the working fluid from the pump 21 pumps into the hydraulic line 17 and further into the left cavity of the hydraulic jacks 7, and the pump 24 communicates with the hydraulic main 17 which becomes reverse after reversal. After reverse

the tool member moves to the right, and the work cycle repeats.

The position of the cams 13 and 14 relative to the levers 5 and 5 is adjusted by turning them about the axis, thereby setting the speed in the desired position of the working body. In the case when the cams 13 and 14 are installed so that the spools 9 and 10 are simultaneously turned on, the check valves 22 and 23 ensure the movement of the working fluid from

pump 24 through spool 9 or 10 to hydraulic line 17 or 18 (to the one that is currently in effect) and prevent movement of the working fluid in the opposite direction.

The position of the cams 12 and 15 is also adjustable, which determines the swing angle and, accordingly, the cross-section of the excavation.

Subject matter

A device for moving the working body of a combine harvester, including an articulated parallelogram, the lateral links of which are equipped with profiled cams and are connected by hydraulic jacks, pumping

station with two pumps and reversing valve, characterized in that, in order to provide the possibility of automatically changing the speed of movement of the working body simultaneously with the direction reversal

It is equipped with spools interacting with parallelogram links, each of which is connected to the pressure line of one of the pumps and the hydraulic cylinders supply line.

(rig 2